Improvement in machines for dressing stone



THUMASWOGDS.

Improvement in Machines for Dre-ssingStone.

N0. 118,323, I Ptented Aug. 22, lh

4Ulvrrnn S'rn'rns PATENT FFICE.

THOMAS WOODS, OF NIOHOLASVILLE, KENTUCKY.

Specification forming part of Letters Patent N o. 118,323, dated August22, 1871.

To all whom it may concern:

Be it known that I, THOMAS WOODS, of Nicholasville, in the county ofJessamine and State of Kentucky, have invented an Improved Stone-Dressing Machine, of which the following is a specification The firstpart of my invention relates to the construction of a cylinder composedof a series of pairs of metallic disks, each pair held a certaindistance apart by blocks interposed between them and the disks, andblocks made fast upon a shaft so that they will not revolve except withthe shaft, and confining the .said parts together by screw-nuts on eachend ofthe shaft, and, further, in placingI and hinging a series ofcutters Of any desired form between each pair of disks, and having thecutters of such length that they will all, when extended radially fromthe shaft,

reach the same dist-ance'therefrom, so that when the cylinder isrevolved in One direction a stone passing under it and within reach ofthe cutters in an opposite direction will be cast and planed until itstop surface is level and parallel to the axis of the said shaft.invention relates to the construction of a carriage similar to asaw-mill carriage, by which the stone is to be borne back and forthunder the cylinder upon a platform, which is sustained over the riage byfour or more screw-bolts in such amanner as to render theplatformadjustable, so that the stone may be faced into any plane that may bedesired.

The accompanying draaving represents a per spective view of the frame ofthe machine, the carriage and platform, and the shalt, cylinders, andcutters.

A A A indicate the base-frame; B B, the uprights, in the tops of whichthe'shaft E is journaled, c c l? 1t, the carriage; D, the platform,perforated with as many holes, K, as may be necessary. The stone is tobe prevented from slippingl out of place by pins inserted in these holeson every side of it, their upper ends extending above the surface. Thescrew-shafts are indicated by F, and may be enlarged, as shown, into aflange or wheel between the earriage and platform so that they may beoperated conveniently. G is a fast pulley upon the shaft E, by means ofwhich the power 'to revolve the shaft is connnunicatedaand b indicatesthe nuts on each end of the shaft that hold the parts of the cylindertogether, auch L indicates the disks, and H three different forms ofcutters, and c c are stops to prevent the cutters from being thrown Thesecond part of myforward out of their radial line to the main shaft, andd indicates the blocks interposed between each pair of the disks L. l

Reciprocating motion may be given to the carriage in any suitablemanner. The cutters may have any suitable form, and there may be severaldifferent forms of them upon the same cylinder, provided that theseforms are such that they will act efficiently. They, will all turnfreely on their pivots through their inner ends and the disk betweenwhich they swii'lg. When they become dull or are broken, then, byunscrewing the nuts Z), the disks come asunder, and then the cutters canbe easily taken out and ground and broken ones replaced by new ones.

The mode of operation of this machine is simply this: The shaft andcylinder are revolved rapidly in the direction designed, and each cutteris thrown in the line of a radius to the circle of the cylinder bycentrifugal force, and in this manner approaches and strikes the stoneand expends upon it either a part or the whole of its momentum,according tO the amount of resistance in the way. lf it expends thewhole of its momentum upon the stone it is thrown back and then isdragged forward by its rivet until it is thrown again into its radialposition by centrifugal force, ready for another blow during the nextrevolution; but if the projections or points upon the surface of thestone should yield and come off without eXhaustin g the momentum of thecutter the latter will be` more or less retarded in its course aroundits circuit. One result of this construction and operation is that theforce of each blow by a cutter is regulated by its size, form, andweight in connection with the speed of revolution of the cylinder, andanother is that A if the cutters are equally distributed around theperiphery of the cylinder the force required to turn the same will benearly uniform, and as a consequence a uniform supply of force willsecure a like speed of revolution.

I claim as my inventionl. The cylinder, composed of the disks L, dividedinto pairs by the blocks d and held together by the nuts b upon theshaft E, substantially as and for the purpose described.

2. The critters H, pivoted, constructed, and operated substantially inthe manner and for the purpose described. THOMAS WOODS.

Witnesses: l

NATHAMEL H. RUSSELL, ANDREW GROW.

